From 02751cb50d2791be12476db14554a2093a52b6a0 Mon Sep 17 00:00:00 2001
From: tv <tv@krebsco.de>
Date: Tue, 20 Dec 2022 20:00:01 +0100
Subject: lib.haskell.substitutePkg: sort and dedup deps

---
 lib/haskell.nix | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'lib')

diff --git a/lib/haskell.nix b/lib/haskell.nix
index 4f0ee05ab..f87cfa761 100644
--- a/lib/haskell.nix
+++ b/lib/haskell.nix
@@ -39,7 +39,12 @@ rec {
         in
         if parse == null then
           (pkgs.writeText name s).overrideAttrs (old: {
-            dependencies = old.dependencies or [] ++ dependencies;
+            dependencies =
+              lib.uniq
+                (lib.sort (lib.on lib.lessThan (lib.getAttr "name"))
+                  (filter
+                    (lib.ne null)
+                    (old.dependencies or [] ++ dependencies)));
           })
 
         else
-- 
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